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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.filter;
import com.yahoo.jdisc.AbstractResource;
import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.handler.ContentChannel;
import com.yahoo.jdisc.handler.ResponseHandler;
import com.yahoo.jdisc.http.HttpRequest;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
/**
* Implementation of TypedFilterChain for DiscFilterRequest
*
* @author tejalk
*/
public final class SecurityRequestFilterChain extends AbstractResource implements RequestFilter {
private final List<SecurityRequestFilter> filters = new ArrayList<>();
private SecurityRequestFilterChain(Iterable<? extends SecurityRequestFilter> filters) {
for (SecurityRequestFilter filter : filters) {
this.filters.add(filter);
}
}
@Override
public void filter(HttpRequest request, ResponseHandler responseHandler) {
DiscFilterRequest discFilterRequest = new JdiscFilterRequest(request);
filter(discFilterRequest, responseHandler);
}
public void filter(DiscFilterRequest request, ResponseHandler responseHandler) {
ResponseHandlerGuard guard = new ResponseHandlerGuard(responseHandler);
for (int i = 0, len = filters.size(); i < len && !guard.isDone(); ++i) {
filters.get(i).filter(request, guard);
}
}
public static RequestFilter newInstance(SecurityRequestFilter... filters) {
return newInstance(Arrays.asList(filters));
}
public static RequestFilter newInstance(List<? extends SecurityRequestFilter> filters) {
return new SecurityRequestFilterChain(filters);
}
private static class ResponseHandlerGuard implements ResponseHandler {
private final ResponseHandler responseHandler;
private boolean done = false;
public ResponseHandlerGuard(ResponseHandler handler) {
this.responseHandler = handler;
}
@Override
public ContentChannel handleResponse(Response response) {
done = true;
return responseHandler.handleResponse(response);
}
public boolean isDone() {
return done;
}
}
/** Returns an unmodifiable viuew of the filters in this */
public List<SecurityRequestFilter> getFilters() {
return Collections.unmodifiableList(filters);
}
}
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